code: def completions_config():
      return {
          "name": "completions",
          "route_type": "llm/v1/completions",
          "model": {
              "provider": "palm",
              "name": "text-bison",
              "config": {
                  "palm_api_key": "key",
              },
          },
      }
  
file_path: mlflow/tests/gateway/providers/test_palm.py
imports: from unittest import mock
  import pytest
  from aiohttp import ClientTimeout
  from fastapi import HTTPException
  from fastapi.encoders import jsonable_encoder
  from pydantic import ValidationError
  from mlflow.gateway.config import RouteConfig
  from mlflow.gateway.constants import MLFLOW_GATEWAY_ROUTE_TIMEOUT_SECONDS
  from mlflow.gateway.providers.palm import PaLMProvider
  from mlflow.gateway.schemas import chat, completions, embeddings
  from tests.gateway.tools import MockAsyncResponse
label_desc: Use image node_id 1 for calling a global function with example usage: completions_config() and returns: dict